1
PS8665B 07/22/03
Features
R
ON
is 4 typical
Low bit-to-bit skew: 200ps
Low crosstalk: 27dB @ 250MHz
Low Current Consumption: 20A
Near-Zero propagation delay: 250ps
Switching speed: 9ns
Channel On-Capacitance: 9.5pF (typical)
V
CC
Operating Range: +3.0V to +3.6V
ESD >2000V . . . Human Body Model
>350 MHz bandwidth (or data frequency)
Packaging (Pb-free & Green available):
48-pin 240 mil wide plastic TSSOP (A)
48-pin 173 mil wide plastic TVSOP (K)
Applications
Dual Physical Layer Device sharing to one interface
connector
SONET OC-12(622Mbps) signal routing
Routes physical layer signals for 10/100/1000 Mbit Ethernet
Description
Pericom Semiconductor's PI3L series of logic circuits are produced
using the Company's advanced sub-micron CMOS technology,
achieving industry leading performance.
The PI3L301D is a 16- to 8-bit multiplexer/demultiplexer LAN
Switch. Industry leading advantages include a propagation delay
of less than 250ps, resulting from its low channel resistance and
I/O capacitance. The device multiplexes differential outputs
from a Gigabit Ethernet transceiver (PHY) device to one of two
corresponding B1 or B2 outputs. The switch is bidirectional and
offers little or no attenuation of the high-speed signals at the outputs.
It is designed for low bit-to-bit skew, high channel-to-channel noise
isolation and is compatible with various standards, such as 10/100/
1000 Base-T (Ethernet).
Generally, this part can be used to replace mechanical relays in
low-voltage LAN applications that interface a physical layer over
CAT 5 or CAT 6 unshielded twisted pair cable through an isolation
transformer.
Pin Description
PI3L301D
3.3V, 16-Bit to 8-Bit, Mux/DeMux
Gigabit Ethernet LAN Switch with Single Enable
Block Diagram
SEL
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
1
B1
0
B
1
1
B
2
0
B
2
3
B
1
2
B
1
3
B
2
2
B
2
5
B
1
4
B
1
5
B
2
4
B
2
7
B
1
6
B
1
7
B
2
6
B
2
1
0
B
1
1
B
1
GND
0
B
2
1
B
2
GND
2
B
1
3
B
1
GND
2
B
2
3
B
2
GND
V
DD
4
B
1
5
B
1
GND
4
B
2
5
B
2
GND
6
B
1
7
B
1
GND
6
B
2
7
B
2
V
DD
A
0
GND
A
1
GND
V
DD
GND
A
2
GND
A
3
GND
V
DD
GND
NC
A
4
GND
A
5
GND
V
DD
GND
A
6
GND
A
7
SEL
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
38
37
36
35
34
48
47
46
45
44
43
33
32
31
30
42
41
40
39
20
21
22
23
24
29
28
27
26
25
2
PS8665B 07/22/03
PI3L301D
3.3V, 16-Bit to 8-Bit, Mux/DeMux
Gigabit Ethernet LAN Switch with Single Enable
Storage Temperature....................................65C to +150C
Supply Voltage to Ground Potential...............0.5V to +4.0V
DC Input Voltage............................................0.5V to +5.5V
DC Output Current......................................................120mA
Power Dissipation...........................................................0.5W
Note:
Stresses greater than those listed under MAXIMUM RATINGS may cause
permanent damage to the device. This is a stress rating only and func-
tional operation of the device at these or any other conditions above those
indicated in the operational sections of this specification is not implied.
Exposure to absolute maximum rating conditions for extended periods
may affect reliability.
Maximum Ratings
(Above which useful life may be impaired. For user guidelines,
not tested.)
Truth Table
Function
SEL
A
N
to
N
B
1
L
A
N
to
N
B
2
H
3
PS8665B 07/22/03
PI3L301D
3.3V, 16-Bit to 8-Bit, Mux/DeMux
Gigabit Ethernet LAN Switch with Single Enable
DC Electrical Characteristics for 10/100 Base-T Ethernet Switching over Operating Range
(T
A
= 40C to +85C, V
CC
= 3.3V 10%)
Paramenter
Description
Test Conditions
Min. Typ.
(2)
Max. Units
V
IH
Input HIGH Voltage
Guaranteed HIGH level
2.0
-
-
V
V
IL
Input LOW Voltage
Guaranteed LOW level
0.5
-
0.8
V
IK
Clamp Diode Voltage
V
CC
= Max., I
IN
= 18mA
-
0.7
1.2
I
IH
Input HIGH Current
V
CC
= Max., V
IN
= V
CC
-
-
5
A
I
IL
Input LOW Current
V
CC
= Max., V
IN
= GND
-
-
5
I
OFF
Power Down Leakage Current
V
CC
= 0V, V
A
= 0V, V
B
3.6
-
-
5
R
ON
Switch On-Resistance
(3)
V
CC
= Min., 1.25V V
IN
V
CC,
I
IN
= 10mA to 30mA
-
-
8
R
FLAT(ON)
On-Resistance Flatness
(4)
V
CC
= Min., V
IN
@ 1.25V and V
CC,
I
IN
= 10mA to 30mA
-
1.0
-
R
ON
On-Resistance match from center ports
to any other port
(4)
V
CC
= Min., 1.25V V
IN
V
CC,
I
IN
= 10mA to 30mA
-
0.9
2.0
DC Electrical Characteristics for 1000 Base-T Ethernet Switching over Operating Range
(T
A
= 40C to +85C, V
CC
= 3.3V 10%)
Paramenter
Description
Test Conditions
Min. Typ.
(2)
Max. Units
V
IH
Input HIGH Voltage
Guaranteed HIGH level
2
-
-
V
V
IL
Input LOW Voltage
Guaranteed LOW level
0.5
-
0.8
V
IK
Clamp Diode Voltage
V
CC
= Max., I
IN
= 18mA
-
0.7
1.2
I
IH
Input HIGH Current
V
CC
= Max., V
IN
= V
CC
-
-
5
A
I
IL
Input LOW Current
V
CC
= Max., V
IN
= GND
-
-
5
I
OFF
Power Down Leakage Current
V
CC
= 0V, V
A
= 0V, V
B
3.6
-
-
5
R
ON
Switch On-Resistance
(3)
V
CC
= Min., 1.5V V
IN
V
CC,
I
IN
= 40mA
-
4
8
R
FLAT(ON)
On-Resistance Flatness
(4)
V
CC
= Min., V
IN
@ 1.5V and V
CC,
I
IN
= 40mA
-
1
-
R
ON
On-Resistance match from center
ports to any other port
(4)
V
CC
= Min., 1.5V V
IN
V
CC,
I
IN
= 40mA
-
0.9
2
4
PS8665B 07/22/03
PI3L301D
3.3V, 16-Bit to 8-Bit, Mux/DeMux
Gigabit Ethernet LAN Switch with Single Enable
Notes:
1. For max. or min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at V
CC
= 3.3V, T
A
= 25C ambient and maximum loading.
Dynamic Electrical Characteristics Over the Operating Range
(TA=-40 to +85C, VCC=3.3V10%, GND=0V)
Parameter
Description
Test Conditions
Min.
Typ.
(2)
Max.
Units
X
TALK
Crosstalk
f = 250MHz, See Fig. 2
-
-27
-
dB
O
IRR
OFF Isolation
f = 250MHz, See Fig. 3
-
-32
-
BW
Bandwidth 3dB
C
L
= 10pf, See Fig. 1
-
350
-
MHz
Notes:
1. For max. or min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Guaranteed by design.
3. The bus switch contributes no propagational delay other than the RC delay of the On-Resistance of the switch and the load capacitance. The
time constant for the switch alone is of the order of 0.25ns for 10pF load. Since this time constant is much smaller than the rise/fall times of
typical driving signals, it adds very little propagational delay to the system. Propagational delay of the bus switch when used in a system is
determined by the driving circuit on the driving side of the switch and its interactions with the load on the driven side.
Power Supply Characteristics
Parameters
Description
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Units
I
CC
Quiescent Power Supply Current
V
CC
= Max., V
IN
= GND or V
CC
-
-
800
A
Notes:
1. For max. or min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at V
CC
= 3.3V, T
A
= 25C ambient and maximum loading.
3. Measured by the voltage drop between A and B pins at indicated current through the switch. On-Resistance is determined by the lower of the
voltages on the two (A & B) pins.
4. This parameter is determined by device characterization but is not production tested.
5. Measured on worst case corner pin.
Capacitance
(T
A
= 25C, f = 1MHz)
Parameters
(4)
Description
Test Conditions
Typ.
Max.
Units
C
IN
Input Capacitance
V
IN
= 0V
3.1
3.6
pF
C
OFF(B1, B2)
Port B Capacitance, Switch OFF
2.8
6.0
C
ON(A/B)
A/B Capacitance, Switch ON
9.5
(5)
10.9
Switching Characteristics
Paramenter
Description
Test
Conditions Min. Typ.
(2)
Max. Units
tPD
Propagation Delay(2,3)
-
0.25
ns
t
PZH
, t
PZL
Line Enable Time - SEL to A
N
, B
N
0.5
-
15
t
PHZ
, t
PLZ
Line Disable Time - SEL to A
N
, B
N
0.5
-
9
t
SK(o)
Output Skew between center port (A4 to A5) to any other port(2)
-
0.1
0.2
t
SK(p)
Skew between opposite transitions of the same output
(t
PHL
- t
PLH
) (2)
-
0.1
0.2
5
PS8665B 07/22/03
PI3L301D
3.3V, 16-Bit to 8-Bit, Mux/DeMux
Gigabit Ethernet LAN Switch with Single Enable
Test Circuit for Electrical Characteristics
(1)
Notes:
1. C
L
= Load capacitance: includes jig and probe capacitance.
2. R
T
= Termination resistance: should be equal to Z
OUT
of the Pulse Generator
3. All input impulses are supplied by generators having the following characteristics: f = 10MHz, Z
O
= 50, t
R
2.5ns, t
F
2.5ns.
4. The outputs are measured one at a time with one transition per measurement.
V
CC
PI3L301D
T
R
S
HP11667A
50-ohm
50-ohm
50-ohm
C
L
= 10pF
HP4396B
Switch Positions
Test
Switch
t
PLZ
, t
PZL
(output on B-side)
6.0V
t
PHZ
, t
PZH
(output on B-side)
GND
Prop Delay
Open
Figure 1. Bandwidth -3db Testing
R
T
10pF
C
L
V
CC
V
IN
V
OUT
200-ohm
200-ohm
6.0V
Pulse
Generator
D.U.T
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